Autonomous system
AS15770 DERWENTSIDE
Unclassified RIPE
Summary
Durham County Council
government business infrastructure
The handle names a district council; the county council that absorbed it holds the block.
What it's used for
- A local authority's network. One IPv4
/20announced from the United Kingdom, no IPv6, four thousand and ninety-six addresses, across two observed BGP neighbours.
Notable
- The AS handle is the name of a district, and the registered holder is the county authority, so the handle preserves a body that was merged into the one now responsible for it.
- The netname is a country code, that same district name and a date from the year two thousand.
- One contact is a maintainer with a three-letter prefix, and another is a role whose name is the registry's own field for abuse reporting with the word for a role appended.
- Four thousand addresses are announced as a single route.
- Three addresses were queried for reverse DNS and none returned a name.
Interesting
- A contact named after the form field it fills is a record created to satisfy a validation rule. The registry required an abuse contact, so one was made and called what the requirement was called.
- Local government reorganisation moves the staff, the budget and the buildings, and leaves the routing registry alone because nothing in the merger touches it. The handle is now the most durable trace of a council that stopped existing.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 4.10K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| GB | United Kingdom | 1 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS15770- Registry name
- DERWENTSIDE
- Registrant
- DERWENTSIDE-MNT
- Abuse contact
- ups@servicedirectnewco.co.uk
- Registered
- 1970-01-01
- Last changed
- 2023-07-25
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 0 authorising AS15770
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 1 naming AS15770
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,781 prefixes, as published 2026-10-16. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere